2113211031021 has 16 divisors (see below), whose sum is σ = 3183745435200. Its totient is φ = 1384929262224.

The previous prime is 2113211030969. The next prime is 2113211031037. The reversal of 2113211031021 is 1201301123112.

2113211031021 is a `hidden beast` number, since 2 + 1 + 1 + 321 + 10 + 310 + 21 = 666.

It is not a de Polignac number, because 2113211031021 - 2¹⁴ = 2113211014637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2113211030985 and 2113211031003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2113211035021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 663278706 + ... + 663281891.

It is an arithmetic number, because the mean of its divisors is an integer number (198984089700).

Almost surely, 2^{2113211031021} is an apocalyptic number.

It is an amenable number.

2113211031021 is a deficient number, since it is larger than the sum of its proper divisors (1070534404179).

2113211031021 is a wasteful number, since it uses less digits than its factorization.

2113211031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1326560665 (or 1326560659 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 2113211031021 its reverse (1201301123112), we get a palindrome (3314512154133).

The spelling of 2113211031021 in words is "two trillion, one hundred thirteen billion, two hundred eleven million, thirty-one thousand, twenty-one".